Panasonic Viera TV platform missing key media_player.select_source :-(

Hello,

I’m using the Panasonic Viera TV platform. But it is missing the key media_player.select_source so I can input to switch from HDMI to TV and vise versa.

Would be great to make things a bit easyer for my wife and kid if I could automate a button. And make Home assistent even more great! I can’t solve it with CEC.

Your effert to upgrade this “media player” (wich is a tv) would be greatly appriciated

With kind regards!